NSF RTG at The Ohio State University NSF
"Arithmetic, Combinatorics, and Topology of Algebraic Varieties"



Award Undergraduate Graduate Postdoctoral People RTG Workshop and Retreat Outcomes


People

Members of the RTG group:

RTG related faculty and research interests:

David Anderson (PI)

DAVID ANDERSON works in algebraic geometry, with connections to combinatorics and representation theory of Lie groups. He is particularly interested in using group actions and techniques from equivariant cohomology to relate modern combinatorics with classical enumerative geometry.


Sergei Chmutov

SERGEI CHMUTOV's research interests and activities lie in the area of combinatorics arising from the theory of knots and links. His current projects include the study of weight systems coming from the Lie algebra glN, the weight systems coming from combinatorics of ribbon graphs and their mutual relationships. Also, he run a REU-like summer program "Knots and Graphs", where students are involved into research in my field.


James Cogdell

JAMES COGDELL works in number theory, particularly the theory of automorphic representations and their L-functions; this is the global analytic side of the Langlands program. Locally, he is interested in Bessel functions of representations and their relations to local constants.


Maria Angelica Cueto (PI)

MARIA ANGELICA CUETO works in combinatorial algebraic geometry, with particular emphasis in tropical and non-Archimedean geometry. Her current projects encompass the topology of surface singularities and computational methods for studying spaces of valuations on classical varieties and their moduli spaces through their initial (tropical) degenerations.


Sachin Gautam

SACHIN GAUTAM works on representation theory of infinite-dimensional quantum groups: Yangians, quantum loop algebras and elliptic quantum groups. He specializes in using analytic methods (asymptotic analysis, Borel resummation) from the theory of difference equations to construct explicit connections among these quantum groups.


Ghaith Hiary

GHAITH HIARY works in works in computational and analytic number theory. Topics include the theory of the Riemann zeta function, Dirichlet L-functions, exponential sums, number theoretic algorithms, and asymptotics motivated by moment problems from number theory and random matrix theory.


Eric Katz

ERIC KATZ studies the interplay between combinatorics and algebraic geometry, with applications to number theory. He uses ideas from tropical geometry to transform questions in algebraic geometry into questions in combinatorics through the combinatorial study of degenerations and stratifications.


Michael Lipnowski

MICHAEL LIPNOWSKI works in number theory, at the nexus of all aspects - arithmetic, spectral geometry, topology, etc. - of locally symmetric spaces. His current projects include p-adic approaches to complex multiplication for non CM number fields and algorithms for building grids on locally symmetric spaces.


Wenzhi Luo

WENZHI LUO is interested in analytic methods and techniques in the studies of arithmetic of automorphic forms, especially arithmetic statistics and quantitative results on the special values of automorphic L-functions, as well as their applications in geometry and arithmetic.


Hoi Nguyen

HOI NGUYEN's primary interests include combinatorics and random matrix theory. More specifically, he is interested in additive, algebraic and probabilistic combinatorics. Within random matrix theory, he is interested in universality behavior of spectral and algebraic statistics, as well as in integrable probability.


Jennifer Park (PI)

JENNIFER PARK is interested in the study of rational points on variety, employing various techniques arising from number theory and algebraic geometry. She is currently studying the distributions of rational points (following Manin's conjecture) on Fano varieties, and definability questions related to finding rational points on varieties.


Stefan Patrikis (PI)

STEFAN PATRIKIS works in number theory and arithmetic geometry, with an emphasis on questions arising out of the Langlands program. His current work focuses on Galois representations: their deformation theory, their monodromy groups and related independence-of-ℓ questions, and their conjectural motivic and automorphic origins.


Nimish Shah


Hsian-Hua Tseng

HSIAN-HUA TSENG's research areas are algebraic and symplectic geometry. His research focuses on Gromov-Witten theory. In particular, he is interested in how various geometric structures on stacks affect Gromov-Witten invariants and connections with other subjects such as integrable systems.


Back to Top


RTG postdocs

Current:
Former:

Back to Top


RTG funded graduate students:

Graduate RTG Fellows:

AUTUMN 2026:
SUMMER 2026:

SPRING 2026:
AUTUMN 2025:
SUMMER 2025:

SPRING 2025:

AUTUMN 2024:

SUMMER 2024:
  • Hugh Dennin

SPRING 2024:
  • Jake Huryn
  • Avery McNeill
  • Luke Wiljanen

AUTUMN 2023:
  • Kyle Binder
  • Zachary Davis
  • Nick Geis
  • Chloe Ireland
  • Will Newman
  • Luke Wiljanen

Former PhD students:
  • 2026:

    1. Suxuan Chen (advisor: Nimish Shah): "Diophantine Approximation on Self-Similar Sets".
    2. Juan Pablo De Rasis (advisor: Jennifer Park): "Efficient computation of Fourier coefficients of eta-quotients and First-order definability of Campana points and Darmon points".
    3. William Newman (advisor: Hsian-Hua Tseng): "Chow Rings of Moduli Spaces via Higher Chow Groups".
    4. Min Shi (advisor: Stefan Patrikis): "G-Companion on Algebraic Stacks and Application to Canonical l-Adic System on Shimura Stacks".
    5. Yubin Shin (advisor: Nimish Shah): "Equidistribution of Expanding Translates of Smooth Curves in Homogeneous Spaces Under the Action of a Product of SO(n,1)'s"
    6. Shifan Zhao (advisor: Wenzhi Luo): "Distribution of Zeros of Automorphic L-Functions"

  • 2025:

    1. Kyle Binder (advisor: Eric Katz): "Tor Groups of the Stanley-Reisner Ring of a Matroid"
    2. Zachary Davis (advisor: Roy Joshua): "Riemann-Roch theorems for horospherical varieties".
    3. Jonathan Hales (advisor: Ghaith Hiary): "Factoring With Partial Information in Z and Imaginary Quadratic Euclidean Domains".
    4. Stefan Nikoloski (advisor: Stefan Patrikis): "Lifting residual Galois representations with prescribed local behavior".

  • 2024:

    1. Qian Chao (advisor: Hsian-Hua Tseng): "The Crepant Transformation Conjecture for Toric Stack Bundles".

    2. Deniz Genlik (advisor: Hsian-Hua Tseng): "Holomorphic Anomaly Equations For [Cn/Zn]".

    3. Jonghoo Lee (advisor: Roy Joshua): "Brauer Group of Split Toric Variety and Split Toric Scheme".

  • 2023:

    1. Chen Chen (advisor: David Anderson): "Total Positivity of the Mixed Grassmannian".

    2. Ian Cavey (advisor: David Anderson): "Combinatorics and Geometry of Hilbert Schemes of Points on Surfaces".

    3. Zhining Wei (advisor: Wenzhi Luo): "The Circle Method and Shifted Convolutions of Fourier Coefficients of Cusp Forms".

Back to Top


RTG funded undergraduate students:

Coming up.


Back to Top


Office assistance:

Webmaster:
  • Maria Angelica Cueto (2023-2024).

Back to Top



Back to the main website of the RTG: "Arithmetic, Combinatorics, and Topology of Algebraic Varieties".


The Ohio State University, Department of Mathematics, 231 W. 18th Avenue, Columbus, OH, 43210, USA.

Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s), and do not necessarily reflect the views of the National Science Foundation.